Coating fabric with rubber



E. C. WIESE COATING FABRIC WITH RUBBER Filgd Jam 39. 1921 E DW/N C. WIEGE INVENTOR y ATTOF? NEY ' 50 tirely Patented Dec. 2, 1924.

UNITED STATES PATENT orrica.

EDWIN c. wIEsE, or MILWAUKEE, wrsconsnr essrenon, BY MESNE AssIomiLEnrs, TO THE rxsx RUBBER COMPANY,-OF cnIoorEE rears, massacnusn'r'rs, a con- PORATION OF MASSACHUSETTS.

' coarme FABRIC WITH RUBBER.

Application filed January 29, 1921. Serial 1%. 440,961.

T all whom it may concern: v

Be it-known that I, EDWIN C. WIEsE, a citizen of the United States, and a resident of Milwaukee, in the county of Milwaukee 6 and State of Wisconsin, have invented certain new and useful Improvements in Coating Fabrics with Rubber, of whichvthe fol lowing is a specification. Y

My invention relates to coating fabric 10 with rubber and the principal object of the invention is to coat with rubber in a more satisfactory manner fabrics which are ditli-. cult tocoat such as-those having short fibres, those having easily shredded fibres, and those having loosely twisted fibres. It is desirable from the standpoint of speed and uniformity to coat such fabrics on a calender such as is used for coating the usual fabrics. Using such a calender in the ordinary manner it has been found that the adhesion of the rubber to the calender and to the fibres on the surface of such fabric is greater than the adhesion of these ,fibres to the body of the fabric. In consequence of this the rubber will follow "around the calender roll and carry with it the surface fibres of such fabric whereas the rubber should separate from the calender roll and be carried away ad'- hering to the fabric.

The single figure of the accompanying drawing shows in vertical section, a conventional type of calender such as is adapted to carry out themethod constituting my invention. H a y In the drawing 1 designates the calender frame which rotatably supports calender rolls 2, 3, and 4;. The rolls are driven in the direction ofthe arrows in any approved manner, the speed of roll 3 being slightly 40 greater than that of the other rolls to produce the desired frictioning effect. Convenv tional means are indicated at 5 to adjust the pressure of the rolls. The several rolls are internally heated as by steam pipes 6, 7,

' and Sentering through the bearings of the rolls. The bankof rubber which is sheeted out on' roll 3 is indicated in dotted lines at 9 and thematerial to be coated is indicated at 10. Since the calender structure is en-. conventional further description thereof is unnecessarv.

'1 Ihave found that by running the calender the calender rolls also-in the usual manner.

I may secure the warm stock by keeping all of the rolls of the calender relatively warm 'but I prefer to keep the center roll somewhat cooler than the top and bottom rolls so that the rubber while remaining warm will have less tendency to adhere to the center roll than it will to the fabric which has been warmed by the warmer lower roll.

It will be understood that after applying this firstcoat to one side of the fabric I may apply such further coats as may be found desirable. Inimpregnating asbestos fabric which is to be used for brake lining I find that a similar coating on the reverse side of the fabric produces all of the rubber needed. y

It will be understood that the above description is for the purpose of illustration only and that my invention isnot limited thereby.

I claim: a

1. The method of coating fabric with rubber which comprises assmg. the fabric through a rubberizing ca ender underfrictioning motion and with the lower roll warmer than the center roll.

2. The method .of coating fabric with rubber which comprises assing the fabric through a rubberizing ca ender under frictioning motion with the upper and lower rolls warmer than the center roll. a

3. The method of coating fabric with rubber which comprises assmg the fabric through a rubberizing ca ender under frictioning motion with the rolls relatively warm and thelower. roll warmer than the center roll. 7

4. The method of coating fabric with rubber which comprises passmg the fabric through a rubberizing calender under frictioning motion with the rolls relatively warm and the upper and lower rolls warmer than the center roll. a

5. The method of coating fabric with rubber which comprises passing the fabric through a rubberizing calender under frictioning motion withthe rubber relatively warm and the lower roll warmer than the center roll.

6. The method of coating fabric with rubber which comprises passing the fabric through a rubberizing calender under frictioning motion with the rubber relatively warm and the upper and lowerrolls warmer than the center roll.

7. The method of coating. fabric with rubber which comprises passing the fabric through a rubberizing calender under frictioning motion with the rolls relatively warm and with the upper and center rolls so serum the coating on the center roll is relatively thin.

8. The method of coating fabric with rubber which comprises asslng the fabric through a rubberizing ca ender underfrictioning motion with the rubber relatively warm and with the upper and center rolls so set that the coating on the center roll is relatively thin.

9. The method of coating fabric with rubber whichcomprises assing the fabric through a rubberizing ca ender under frictionin ,motion with the lower roll warmer than t e center roll and with the upper and center rolls so set that the coating on the center roll is relatively thin.

10. The method of coating fabric with rubber which comprises passing the fabric through a rubberizing calender under frictioning motion with the upper and lower rolls warmer than the center roll and with the upper and center rolls so set that the coatin on the center roll is relatively thin.

11. he method of coating fabric with rubber which comprises passing the fabric through a rubberizing calender under frictionin motion with the rolls relatively-warm and the lower roll warmer than the center roll and with the upper and center rolls so set that the coating on the center roll is relatively thin.

12. The method of coating fabric with rubber which comprises passing the fabric through a rubberizing calender under frictioning motion with the rolls relatively warm and the upper and lower rolls warmer than the center roll and with the upper and center rolls so. set that the coating on the center roll is relatively thin. V

13. The method of coating fabric with rubber which comprises passing the fabric througha rubberizing. calender under fric-- tioning motion with the rubber relatively warm and 'the lower roll warmer than the center roll and with the upper and center rolls so set that the coating on the center roll is relatively thin.

14. The method of coating fabric with rubber which comprises passlng the fabric through a rubberizing calender under frictioning motion with the rubber relatively warm and the upper and lower rolls warmer than the center roll and with the upper and center rolls so set that the coating on the center roll is relatively thin.

15. The method, of coating fabric with rubber which comprises passing the fabric through a rubberizing calender under frictioning motion with the rolls relatively warm and with the upper and center rolls so set that the coating on the center roll is relatively thin, and the center and lower rolls so set that substantially this entire coating is taken off onto the fabric.

16. The method of coating fabric with rubber which comprises passing the fabric through a rubberizingcalender under frictioning motion with the rubber relatively warm and with the upper and center rolls so set that the coating on the center roll is relatively thin and the center and lower rolls so set that substantially this entire coating is taken off onto the fabric.

17. The method of coating fabric with rubber which comprises assing the fabric through a rubberizing ca ender under frictioning motion with the lower roll warmer than the center roll and with the upper and center rolls so set that the coating on the center roll is relatively thin and with the center and lower rolls so set that substantially this entire coating is taken off onto the fabric.

18. The method of coati fabric with rubber which comprises assing the fabric through a rubberizing ca ender under frictioning motion .with the upper and lower rolls warmer than the center roll and with the upper and center rolls so set that the coating on the center roll is relatively thin and the center and lower rolls so set that substantially this entire coating is taken off onto the fabric.

19. The method of coating fabric with rubber which comprises ssmg the fabric through a rubberizing ca ender under frictioning motion with the rolls relatively warm and the lower roll warmer than the center roll and with the upper and center rolls so set that the coating on the center roll is relatively thin and the center and lower rolls so set that substantially this entire coating is taken off onto the fabric.

20. The method of coating fabric with rubber which comprises asslng the fabric through a rubberizing ca ender under frictionin'g motion with the rolls relatively warm and the upper and lower rolls warmer than the center roll and with the upper and 1.a17,eoe

center rolls so set that the coating on the center roll is relatively thin and the center and lower rolls so set that substantially this entire coating is taken off onto the fabric.

21. The method of coating fabric with rubber which comprises asslng the fabric through a rubberizing ca ender under frictioning motion with the rubber relatively warm and the lower roll warmer than the center roll and with the upper and center rolls so set that the coating on the center roll is relatively thin and the center and lower rolls so set that substantially this entire coating is taken off onto the fabric.

22. The method of coating fabric with rubber which comprises asslng the fabric through a rubberizing ca ender under frictioning motion with the rubber relatively warm and the upper and lower rolls warmer than the center rolls and "with the upper and center rolls so set that the coating on the center roll is relatively thin and the center and lower rolls so set that substantially this entire coatin is taken off-onto the fabric.

23. A met 0d of coating loosely formed fabric with rubber which comprises passing the fabric through a rubberizing calender with heated rolls under frictioning motion and with heat and pressure suflicient to re lease the rubber on the carrying roll of the calender, to the said fabric as the latter passes through the calender.

In testimon whereof I have signed my name to the a ove s ecification.

EDWIN C. WTESE 

